The telling of the failed effort to colonize Moria by Balin & company
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is not necessary for the telling of The Hobbit. If it had been I am sure the Professor would have included it. The existance of Aragorn in the guise of Estel at Rivendel is not necessary to the telling of the Hobbit. Even the action of the White Wizards against the Necromancer does not need to be elaborated to tell the story of the Hobbit. Any and all of these things may be included in the Hobbit movies but they will not add to the story that Tolkien wrote and published as the Hobbit. However the additions may serve other ends that some (but not all) might deem desirable. Kangi Ska Resident Trickster & Wicked White Crebain New Zealand is Middle-earth & today life is good.